Tail-board for bean-threshers.



H. N. ALWOOD.

TAIL BOARD FOR BEAN THRESHERS.

APPLIOAT ION FILED NOV. 21, 1910.

1,029,251 Patented June 11, 1912.

' Wimrnnrn 4 4 h luummr UNITED STATES PATENT OFFICE.

HUBERT N. ALWOOID, OF POTTERVILLE, MICHIGAN.

TAIL-BOARD FOR BEAN-THRESHERS.

To all whom it may concern.-

Be it known that I, HUBERT N. ALwoon, a citizen of the United States, residing at Po-tterville, county of Eaton, State of Michigan, have invented a certain new and useful Improvement in Tail-Boards for Bean-Threshers, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to tail-boards of threshing machines.

It has for its object an improved double tail-board adapted to be appliedto the rear end of the fanning mill section of a threshing machine and is applied to such machines when in use for threshing beans for the purpose of preventing the wind from the fan from blowing over with the hulls and other refuse matter that reaches the sieves.

of the fanning mill those bean berries which are still mingled with the hulls and chaff at this point and are lost. This tail-board is not intended to be applied to any particular machine, but is for general use with many makes of machines, and its application to a particular machine is indicated in order that its general use may be understood.

In the drawings: Figure 1, shows the rear end of the fanning mill part of the threshing machine with parts broken away. Fig. 2, is a perspective showing the tail-board embodying the invention.

The tail end of the fanning mill part of the machine provided with sieves 1, 2 and 3 is also provided with a tail-board which directs the chaff and refuse material in the last part of its travel out from the machine. Usually this is an inclined board provided with a number of fingers which act as sieves and under which the last remnant of the beans to be saved are supposed to slide backward down the incline into a receptacle placed at the lower end thereof. The blast from the fan is, however, so strong that many bean berries arecarried out. In this invention I make the tail-board double and in place of the single board which may be spoken of as the board 4: in the Fig. 1 of the drawing over which are the fingers 6, I place a second board 5 below the board 4, spaced therefrom by a distance such that the beans may easily slide between the two,

Specification of Letters Patent.

Application filed November 21, 1910.

Patented June 11, 1912.

Serial No. 593,347.

and at the extreme rear end of the board 6 I make an opening 7 into which the beans traveling up and along the short horizontal part leading from the inclined tail-board 4 drop. There is always a sufficient wind force at this inclined floor to drive some of the remnant beans up and over the tailboard, and most of these beans are caught in the slot 7 which crosses the tailboard on the horizontal part 8 thereof where the force of the wind is diminished because of the angular rise of the part 1 and the horizontal continuance of the part 8 beyond the inclined part t shields the part 8 from the full force of the wind, yet the force of the wind is suflicient to carry the lighter hulls and chaff over the slot and beyond the extreme rear edge'of the tail-board. Beans sliding down the inclined parts 1 and 5 of the tail-board drop into the receptacle 9 which is the same receptacle heretofore used.

This improvement consists essentially in providing a double tail-board of which the lowermost part is adapted to form a conveyance for beans dropping upon it and which is almost entirely shielded from the force of the wind produced by the fanand is auxiliary to the inclined tail-board heretofore used.

What I claim is 1. In a threshing machine, in combination with a fanning mill an open top tail board comprising two upper surfaces having an angular relation greater than a straight angle, the forward surface being adapted to direct the air current, fingers engaging above the surface adjacent to said mill, said board portion more remote from said mill being provided with a slot and receiving means thereunder.

2. In a threshing machine, a tail board having in combination an unobstructed upper board and a lower board, the two boards being closed together at the rear end and the upper board being bent to form forward and rear surfaces, the forward surface of the upper board being arranged in the path of the air blast and adapted, thereby, to deflect the same over and above the rear surface and the upper board having its rear surface partially cut away to form a catch slot through which the berries may drop and be conveyed away on the lower board, substantially as described.

3. In a threshing machine, a tail board having in combination an unobstructed upper board and a lower board, the two boards being bent near their centers to form forward and rear surfaces, the forward sur face of the upper board being placed in the path of an air blast, a receptacle located under the forward edge of the two boards, the rear surface of the upper board being inclined away from the air current escaping from the end of the forward surface and being provided with a catch slot through which the heavier particles dropped from the air current onto the upper board drop, the lower board being inclined to convey such particles into said above mentioned receptacle, substantially as described.

4:. In a threshing machine, a tail board having in combination an upper board unobstructed for the passage of air therealong and thereaway from and bent near its center to form a forward and a rear surface meeting at an angle, the said forward surface being'arranged in the path of an air blast and the rear surface being inclined away from the forward surface as aforesaid to allow the air blast to pass over and away from the rear surface, and the said rear surface having a catch slot cut therein, through which heavier particles, having dropped out of the air blast and onto the rear surface, drop, and means for conveying such dropping particles away, substantially as described;

In testimony whereof, I sign this specification in the presence of two witnesses.

HUBERT N. ALWVO OD.

lVitnesses:

GEO. J. SoorlnLn, W. E. BASS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

